<template xlang="wxml">
	<view class="tki-tree container">
		<view class="tki-tree-mask" :class="{'show':showTree}" @tap="_cancel"></view>
		<view class="tki-tree-cnt" :class="{'show':showTree}" :style="{top:top}">

			<!-- 单选才显示 -->
			<view v-if="multiple === false" class="tki-tree-bar">
				<view class="tki-tree-bar-cancel" :style="{'color':cancelColor}" hover-class="hover-c" @tap="_cancel">取消
				</view>
				<view class="tki-tree-bar-title" :style="{'color':titleColor}">{{title}}</view>
				<view class="tki-tree-bar-confirm" :style="{'color':confirmColor}" hover-class="hover-c"
					@tap="_confirm">确定</view>
			</view>

			<view class="tki-tree-view">
				<scroll-view class="tki-tree-view-sc" :scroll-y="true">
					<block v-for="(item, index) in treeList" :key="index">
						<view class="tki-tree-item" :style="[{
							paddingLeft: item.rank*15 + 'px',
							zIndex: item.rank*-1 +50
						}]" :class="{
							border: border === true,
							show: item.show,
							last: item.lastRank,
							showchild: item.showChild,
							open: item.open,
						}">
							<view class="tki-tree-label" @tap.stop="_treeItemTap(item, index)">
								<image class="tki-tree-icon"
									:src="item.lastRank ? lastIcon : item.showChild ? currentIcon : defaultIcon">
								</image>
								{{item.name}}
							</view>
							<view class="tki-tree-check" @tap.stop="_treeItemSelect(item, index)"
								v-if="selectParent?true:item.lastRank">

								<view v-if="multiple">
									<uni-icons type="compose mr10" size="26" class="u-warn-color"
										@tap="handleUpdate(item.id)"></uni-icons>
									<uni-icons type="trash-filled mr10" size="26" class="u-danger-color"
										@tap="handleDelte(item.id)"></uni-icons>
									<uni-icons type="plus-filled" size="26" class="u-primary-color"
										@tap="handleAdd(item.id)"></uni-icons>
								</view>
								<view v-else>
									<view class="tki-tree-check-yes" v-if="item.checked" :class="{'radio':!multiple}"
										:style="{'border-color':confirmColor}">
										<view class="tki-tree-check-yes-b" :style="{'background-color':confirmColor}">
										</view>
									</view>
									<view class="tki-tree-check-no" v-else :class="{'radio':!multiple}"
										:style="{'border-color':confirmColor}"></view>
								</view>
							</view>
						</view>
					</block>
				</scroll-view>
			</view>
		</view>
	</view>
</template>

<script>
	import {
		productApi
	} from '@/utils/api.js'
	export default {
		name: "tki-tree",
		props: {
			lazy: {
				type: Boolean,
				default: false
			},
			range: {
				type: Array,
				default: function() {
					return []
				}
			},
			idKey: {
				type: String,
				default: 'id'
			},
			rangeKey: {
				type: String,
				default: 'label'
			},
			title: {
				type: String,
				default: ''
			},
			multiple: { //是否可以多选
				type: Boolean,
				default: false
				// default: true
			},
			selectParent: { //是否可以选父级
				type: Boolean,
				default: false
			},
			foldAll: { //折叠时关闭所有已经打开的子集，再次打开时需要一级一级打开
				type: Boolean,
				default: false
			},
			confirmColor: { //确定按钮颜色
				type: String,
				default: '' //#0d6efd
			},
			cancelColor: { //取消按钮颜色
				type: String,
				default: '' //#757575
			},
			titleColor: { //标题颜色
				type: String,
				default: '' //#757575
			},
			currentIcon: { //展开时候的ic
				type: String,
				default: ''
			},
			defaultIcon: { //折叠时候的ic
				type: String,
				default: ''
			},
			lastIcon: { //没有子集的ic
				type: String,
				default: ''
			},
			border: { //是否有分割线
				type: Boolean,
				default: false
			},
			modules: { //目标模块 
				type: String,
				default: ''
			},
			modulesName: { //目标模块名称 
				type: String,
				default: ''
			}
		},
		data() {
			return {
				showTree: false,
				treeList: [],
				selectIndex: -1,
				returnedItem: [], //定义一个空数组
				pids: [],
				ancestorsIds: [],
				childNums: [],
				top: '300rpx'
			}
		},
		computed: {},
		methods: {
			_show() {
				this.showTree = true
			},
			_hide() {
				this.showTree = false
			},
			_cancel() {
				this._hide()
				this.$emit("cancel", '');
			},
			_confirm() {
				//处理所选数据
				let rt = [],
					obj = {};
				this.treeList.forEach((v, i) => {
					if (this.treeList[i].checked) {
						console.log(this.treeList[i])
						rt.push(this.treeList[i].id)
					}
				})
				this._hide()
				this.$emit("confirm", rt);
			},
			//扁平化树结构
			_renderTreeList(list = [], rank = 0, parentId = [], parents = []) {
				list.forEach(item => {
					this.treeList.push({
						id: item[this.idKey],
						name: item[this.rangeKey],
						source: item,
						parentId, //父级id数组
						parents, //父级id数组
						rank, //层级
						showChild: false, //子级是否显示
						open: false, //是否打开
						show: rank === 0, //自身是否显示
						hideArr: [],
						orChecked: item.checked ? item.checked : false,
						checked: item.checked ? item.checked : false,
						childNum: 0
					})

					if (Array.isArray(item.children) && item.children.length > 0) {
						// console.log(item)
						let parentid = [...parentId],
							parentArr = [...parents];
						delete parentArr.children
						parentid.push(item[this.idKey]);
						parentArr.push({
							[this.idKey]: item[this.idKey],
							[this.rangeKey]: item[this.rangeKey]
						})
						// lazy
						if (!this.lazy) {
							this._renderTreeList(item.children, rank + 1, parentid, parentArr)
						}
					} else {
						this.treeList[this.treeList.length - 1].lastRank = true;
					}
				})
			},
			//处理默认选择
			_defaultSelect() {
				this.treeList.forEach((v, i) => {
					if (v.checked) {
						this.treeList.forEach((v2, i2) => {
							if (v.parentId.toString().indexOf(v2.parentId.toString()) >= 0) {
								v2.show = true
								if (v.parentId.includes(v2.id)) {
									v2.showChild = true;
									v2.open = true;
								}
							}
						})
					}
				})
			},
			getOwn(id, arr) {
				//利用foreach循环遍历
				arr.forEach((item) => {
					//判断递归结束条件
					if (item[this.idKey] == id) {
						//存储数据到空数组
						this.returnedItem = item
					} else if (item.children != null) //判断chlidren是否有数据
					{
						//递归调用
						this.getOwn(id, item.children);
					}
				})
				return this.returnedItem
			},
			setShow(id, arr, isShow) {
				arr.forEach((item, index) => {
					if (item.parentId.includes(id)) {
						this.treeList[index].showChild = isShow
						this.treeList[index].show = isShow
					} else if (item.children !== undefined) {
						this.setShow(id, item.children, isShow)
					}
				})
			},
			//点击
			_treeItemTap(item, index) {
				// console.log(item)
				if (item.lastRank === true) {
					//点击最后一级时触发事件
					this.treeList[index].checked = !this.treeList[index].checked
					this._fixMultiple(index)
					return;
				}
				let id = item.id;
				item.showChild = !item.showChild;
				// qingqian
				if (item.showChild) {
					const range = this.range
					const parentIdArr = item.parentId
					// 找到当前元素
					const own = this.getOwn(id, range)
					const checkedChildren = own.children
					// 子元素插入的索引位置
					const nextIndex = this.treeList.findIndex(itemT => itemT.id === item.id)
					// console.log(checkedChildren);
					if (checkedChildren === undefined || checkedChildren.length < 1) {
						return
					}
					//子节点数量
					this.treeList[index].childNum = checkedChildren.length
					const newRank = item.rank + 1
					checkedChildren.forEach(itemC => {
						const childObj = {
							id: itemC[this.idKey],
							name: itemC[this.rangeKey],
							source: {},
							parentId: [item.id], //父级id数组
							parents: [item], //父级id数组
							rank: newRank, //层级
							showChild: false, //子级是否显示
							open: false, //是否打开
							show: 1, //自身是否显示
							hideArr: [],
							orChecked: this.treeList[index].checked,
							checked: this.treeList[index].checked,
						}
						if (!this.treeList.some(itemT => itemT.id === itemC[this.idKey])) {
							this.treeList.splice(nextIndex + 1, 0, childObj)
						}
					})
				}
				// 展开/隐藏子级/孙级
				let list = this.treeList
				item.open = item.showChild ? true : !item.open;
				list.forEach((childItem, i) => {
					if (item.showChild === false) {
						//隐藏所有子级
						if (!childItem.parentId.includes(id)) {
							return;
						}
						//TODO: 修改
						if (!this.foldAll) {
							if (childItem.lastRank !== true && !childItem.open) {
								childItem.showChild = false;
								this.setShow(childItem.id, this.treeList, false)
							}
							// 为隐藏的内容添加一个标记
							if (childItem.show) {
								childItem.hideArr[item.rank] = id
							}
						} else {
							if (childItem.lastRank !== true) {
								childItem.showChild = false;
								// 继续隐藏子级的的子级
								this.setShow(childItem.id, this.treeList, false)
							}
						}
						if (childItem.children !== undefined) {
							childItem.children.forEach((childItem1, i1) => {
								if (!childItem1.parentId.includes(childItem.id)) {
									return
								}
								childItem.children[i1].showChild = false
								childItem.children[i1].show = false
							})
						}
						childItem.show = false;
					} else {
						//打开子集
						if (childItem.parentId[childItem.parentId.length - 1] === id) {
							childItem.show = true;
						}
						//打开被隐藏的子集
						if (childItem.parentId.includes(id) && !this.foldAll) {
							// console.log(childItem.hideArr)
							if (childItem.hideArr[item.rank] === id) {
								childItem.show = true;
								if (childItem.open && childItem.showChild) {
									childItem.showChild = true
								} else {
									childItem.showChild = false
								}
								childItem.hideArr[item.rank] = null
							}
						}
					}
				})
			},
			//通过父id处理子级
			syncChecked(trees, pid, checked) {
				trees.forEach((item, index) => {
					if (item.parentId.includes(pid)) {
						this.treeList[index].checked = checked
						this.syncChecked(trees, item.id, checked)
					} else if (item.children !== undefined) {
						this.syncChecked(item.children, pid, checked)
					}
				})
			},
			//获取父级往上所有层级的id 并同步状态
			setAncestors(pids, checked) {
				this.treeList.forEach((item, index) => {
					if (pids.includes(item.id)) {
						if (checked && this.childNums[item.id] !== undefined && item.childNum === this.childNums[
								item.id]) {
							//子级全部选中, 父级才选中
							this.treeList[index].checked = true
						} else {
							this.treeList[index].checked = false
						}
						this.setAncestors(item.parentId, checked)
					}
				})
			},
			_treeItemSelect(item, index) {
				this.treeList[index].checked = !this.treeList[index].checked
				//选父级, 子级自动全选
				this.syncChecked(this.treeList, item.id, this.treeList[index].checked)

				if (item.rank > 0) {
					item.parentId.forEach((pid, indexP) => {
						const parent = this.treeList.filter(i => i.id === pid)
						const childNum = parent.length > 0 ? parent[0].childNum : 0
						if (this.childNums[pid] === undefined) {
							this.childNums[pid] = 1
						} else if (this.childNums[pid] < childNum) {
							this.childNums[pid]++
						}
					})
					//子级选择/选满/取消选择, 父级往上同步状态
					this.setAncestors(item.parentId, this.treeList[index].checked)
				}
				this._fixMultiple(index)
			},
			//处理单选多选
			_fixMultiple(index) {
				if (!this.multiple) {
					//如果是单选
					this.treeList.forEach((v, i) => {
						if (i != index) {
							this.treeList[i].checked = false
						} else {
							this.treeList[i].checked = true
						}
					})
				}
			},
			//重置数据
			_reTreeList() {
				this.treeList.forEach((v, i) => {
					this.treeList[i].checked = v.orChecked
				})
			},
			_initTree(range = this.range) {
				this.treeList = [];
				this._renderTreeList(range);
				this.$nextTick(() => {
					this._defaultSelect(range)
				})
			},
			handleUpdate(data) {
				uni.navigateTo({
					// url: "/pages/product/gategory/update?id=" + data + "&navTitle=编辑商品分类"
					url: "/pages/product/"+this.modules+"/update?id=" + data + "&navTitle=编辑商品"+this.modulesName
				})
			},
			handleDelte(data) {
				const that = this;
				uni.showModal({
					title: '提示',
					content: '您确定要执行此操作吗？',
					showCancel: true, //是否显示取消按钮，默认为true
					cancelText: '取消', //取消按钮的文字，默认为"取消"
					cancelColor: '#000000', //取消按钮的文字颜色，默认为"#000000"
					confirmText: '确定', //确定按钮的文字，默认为"确定"
					confirmColor: '#3CC51F', //确定按钮的文字颜色，默认为"#3CC51F"
					success: function(res) {
						if (res.confirm) {
							console.log('用户点击确定');
							if (that.modules === 'gategory') {
								//执行确认后的操作
								productApi.deleteProductGategory({
									id: data
								}).then(() => {
									uni.showToast({
										title: '操作成功',
										icon: 'success',
										duration: 1000
									});
									//调用父级方法
									that.$emit('initData', {
										data: '传递给父组件的数据'
									});
								})
							} else if (that.modules === 'specifications') {
								//执行确认后的操作
								productApi.deleteSpecifications({
									id: data
								}).then(() => {
									uni.showToast({
										title: '操作成功',
										icon: 'success',
										duration: 1000
									});
									//调用父级方法
									that.$emit('initData', {
										data: '传递给父组件的数据'
									});
								})
							}
							
						} else if (res.cancel) {
							console.log('用户点击取消');
							//执行取消后的操作
						}
					}
				});
			},
			//添加子级
			handleAdd(data) {
				uni.navigateTo({
					// url: "/pages/product/gategory/update?pid=" + data + "&navTitle=添加商品分类"
					url: "/pages/product/"+this.modules+"/update?pid=" + data + "&navTitle=添加商品"+this.modulesName
				})
			}
		},
		watch: {
			range(list) {
				this._initTree(list);
			},
			multiple() {
				if (this.range.length) {
					this._reTreeList();
				}
			},
			selectParent() {
				if (this.range.length) {
					this._reTreeList();
				}
			},
		},
		mounted() {
			this._initTree();
			if (this.multiple) {
				this.top = 0;
			}
		}
	}
</script>

<style scoped>
	.tki-tree-mask {
		display: none;
		position: fixed;
		top: 0rpx;
		right: 0rpx;
		bottom: 0rpx;
		left: 0rpx;
		z-index: 1;
		background-color: rgba(0, 0, 0, 0.6);
		opacity: 0;
		transition: all 0.3s ease;
		visibility: hidden;
	}

	.tki-tree-mask.show {
		visibility: visible;
		opacity: 1;
	}

	.tki-tree-cnt {
		position: fixed;
		top: 0rpx;
		right: 0rpx;
		bottom: 0rpx;
		left: 0rpx;
		z-index: 1;
		top: 300rpx;
		transition: all 0.3s ease;
		transform: translateY(100%);
	}

	.tki-tree-cnt.show {
		transform: translateY(0);
	}

	.tki-tree-bar {
		background-color: #fff;
		height: 72rpx;
		padding-left: 20rpx;
		padding-right: 20rpx;
		display: flex;
		justify-content: space-between;
		align-items: center;
		box-sizing: border-box;
		border-bottom-width: 1rpx !important;
		border-bottom-style: solid;
		border-bottom-color: #f5f5f5;
		font-size: 32rpx;
		color: #757575;
		line-height: 1;
	}

	.tki-tree-bar-confirm {
		color: #0d6efd;
	}

	.tki-tree-view {
		position: absolute;
		top: 0rpx;
		right: 0rpx;
		bottom: 0rpx;
		left: 0rpx;
		top: 72rpx;
		background-color: #fff;
		padding-top: 20rpx;
		padding-right: 20rpx;
		padding-bottom: 20rpx;
		padding-left: 20rpx;
	}

	.tki-tree-view-sc {
		height: 100%;
		overflow: hidden;
	}

	.tki-tree-item {
		display: flex;
		justify-content: space-between;
		align-items: center;
		font-size: 32rpx;
		color: #757575;
		line-height: 1;
		height: 0;
		opacity: 0;
		transition: 0.2s;
		position: relative;
		overflow: hidden;
	}

	.tki-tree-item.show {
		height: 80rpx;
		opacity: 1;
	}

	.tki-tree-item.showchild:before {
		transform: rotate(90deg);
	}

	.tki-tree-item.last:before {
		opacity: 0;
	}

	.tki-tree-icon {
		width: 26rpx;
		height: 26rpx;
		margin-right: 8rpx;
	}

	.tki-tree-label {
		flex: 1;
		display: flex;
		align-items: center;
		height: 100%;
		line-height: 1.2;
	}

	.tki-tree-check {
		/*  width: 40px;
	  height: 40px; */
		display: flex;
		justify-content: center;
		align-items: center;
	}

	.tki-tree-check-yes,
	.tki-tree-check-no {
		width: 20px;
		height: 20px;
		border-top-left-radius: 20%;
		border-top-right-radius: 20%;
		border-bottom-right-radius: 20%;
		border-bottom-left-radius: 20%;
		border-top-width: 1rpx;
		border-left-width: 1rpx;
		border-bottom-width: 1rpx;
		border-right-width: 1rpx;
		border-style: solid;
		border-color: #0d6efd;
		display: flex;
		justify-content: center;
		align-items: center;
		box-sizing: border-box;
	}

	.tki-tree-check-yes-b {
		width: 12px;
		height: 12px;
		border-top-left-radius: 20%;
		border-top-right-radius: 20%;
		border-bottom-right-radius: 20%;
		border-bottom-left-radius: 20%;
		background-color: #0d6efd;
	}

	.tki-tree-check .radio {
		border-top-left-radius: 50%;
		border-top-right-radius: 50%;
		border-bottom-right-radius: 50%;
		border-bottom-left-radius: 50%;
	}

	.tki-tree-check .radio .tki-tree-check-yes-b {
		border-top-left-radius: 50%;
		border-top-right-radius: 50%;
		border-bottom-right-radius: 50%;
		border-bottom-left-radius: 50%;
	}

	.hover-c {
		opacity: 0.6;
	}

	.uni-group {
		width: 200rpx;
	}
</style>